Storing your login information automatically.

When you select the 'Remember me' option, your login information will be stored on your computer in the form of a cookie. When you visit Forkliftaction.com again, the stored login information will be retrieved automatically and you will not have to submit your login parameters (email address and password) each time you want to visit our members-only pages.

A cookie is a small piece of data that is sent to your browser from a web server and stored on your computer's hard drive. A cookie can't read data off your hard disk or read cookie files created by other sites. Cookies do not damage your system.

Marketplace Business Directory Discussion Forums Spec-Checker Industry News Events Calendar Jobs & Resumes Photo Galleries
Marketplace
Business Directory
Discussion Forums
Home
My profile
Search
Spec-Checker
Industry News
Events Calendar
Jobs & Resumes
Photo Galleries




News service and business centre for materials handlingHOME
Search  
DISCUSSION FORUMS : Forkliftaction.communicate
Forum: Lifting machines
Discussion:  Crown Order Picker Model # SP3020-30 Won't Travel in Reverse
Number of messages: 6

START MESSAGE:
kyle_d
Kansas, United States
I have a Crown Order Picker SP3020-30  that sometimes won't travel in reverse.  I have blown out the Forward & Reverse Contactors and around it also.  I've replaced these within the last 6 - 9 months because they were pitted. Does anyone have an idea what might be causing this reverse problem?

-------------------------
Kyle Downs
Redneck Trailer Supplies
10606 E. 26th Street North
Wichita, Ks 67226


Posted 1 Mar 2012 04:49 AM Reply  Report this message
REPLIES: Sort replies by
radon
Nebraska, United States
I would say its the contact tips again if contactor is pulling in and you don't have travel in one direction only. Is it coding a 24 too? I have seen this with some of the crown SP's in the past. Some times you can clean the tips up abit and it will work fine for awhile, but if pitted bad you have to replace tips. Also check the guide pin on those GE contactors sometimes they break and don't allow tips to make good contact.

Posted 1 Mar 2012 05:32 AM Reply  Report this message
Jplayer
North Carolina, United States

if all you did was replace the tips themselves you may want to go back and double check the insulators for wear. they do wear on one side after a while this can prohibit the movement of the armature and will not allow full travel of it. ultimately causing the tips to not make good contact or not contact at all.
if you can access the tips have someone get on the truck, (make sure the drive wheel is off the floor)
actuate the system without letting it move(in creep speed), wiggle the tips and see if the truck tries to move.
this will verify this problem.
if the contact area is enclosed and non-accessible then you just have to wing it i guess and take them apart.

-------------------------
John Player Jr
_________________
LiftOne, LLC
Charlotte, NC
Email: jplayer@liftone.net


Posted 1 Mar 2012 09:51 AM Reply  Report this message
Liftdoctor
Indiana, United States
I don't replace the tips, I replace the contactor.  These truck are notorious for contactor problems.  Put it up on a block to get the drive tire off the floor, have someone drive the truck slowly in the direction that is failing, and reach in and jiggle the contactor tips.  I think you will find your problem.

Posted 3 Mar 2012 11:27 PM Reply  Report this message
cheek
Alberta, Canada

Did you check the integrity of the reverse switch? If the contactor closes in reverse it is most definetly the contactor, not usually the tip but the armature guides worn.( due to being mounted the way they are)

Posted 7 Mar 2012 01:24 PM Reply  Report this message
chublil
California, United States

Have you checked your voltage signals on the  over the mast cables? This guy has them, correct? Normally when the chains start to stretch or need to be tightened, they wipe out the conductor wire and stretch them. Same thing happens on rech trucks with carriage mounted sol valves and Raymond OP's as well.

-------------------------
Fix it right!!!

Posted 22 Mar 2012 04:56 AM Reply  Report this message


Forkliftaction.com accepts no responsibility for forum content and requires forum participants to adhere to the rules. Click here for more information.
FORUM GLOSSARY
Click for description.

FORUM
DISCUSSION
MESSAGES
NICKNAME
SIGNATURE

FORUMS
©Forkliftaction.com
Forkliftaction Media Pty Ltd
PO Box 1439
Milton QLD 4064
Australia